Method and device for HARQ feedback

Abstract

Embodiments of the disclosure generally relate to feedback of a HARQ acknowledgement. A network device transmits, to a terminal device, a first trigger indicating a feedback mode of a HARQ acknowledgement. The feedback mode is selected from at least one of: a trigger mode, a timing mode, and a mixed mode. In response to successful access to an unsilenced band allocated to the HARQ acknowledgement, the network device transmits, to the terminal device, a second trigger indicating at least one target terminal device that is to feedback the HARQ acknowledgement based on the feedback mode indicated by the first trigger.

What is claimed is: 
     
       1. A method performed by a user equipment (UE), the method comprising:
 receiving, from a base station, a first information in a first Downlink Control Information (DCI) corresponding to a Physical Downlink Shared Channel (PDSCH), the first information relating to a Hybrid Automatic Repeat Request acknowledgement (HARQ-ACK) information of the PDSCH; 
 multiplexing, if the first information does not indicate a timing for transmitting the HARQ-ACK information and the UE receives a second information in a second DCI from the base station, the second information indicating a timing for transmitting the HARQ-ACK information, the HARQ-ACK information of the PDSCH in a Physical Uplink Control Channel (PUCCH) transmission at the timing indicated by the second information; and 
 transmitting, to the base station, the HARQ-ACK information multiplexed in the PUCCH transmission based on the second information. 
 
     
     
       2. The method according to  claim 1 , wherein the second information is scrambled by a dedicated Radio Network Temporary Identifier (RNTI). 
     
     
       3. The method according to  claim 1 , wherein the HARQ-ACK information is associated with one or more HARQ process. 
     
     
       4. A user equipment (UE), comprising:
 a processor; and 
 a memory, the memory containing program including instructions executable by the processor, the processor being configured to cause the UE to: 
 receive, from a base station, a first information in a first Downlink Control Information (DCI) corresponding to a Physical Downlink Shared Channel (PDSCH), the first information relating to a Hybrid Automatic Repeat Request acknowledgement (HARQ-ACK) information of the PDSCH; 
 multiplex, if the first information does not indicate a timing for transmitting the HARQ-ACK information and the UE receives a second information in a second DCI from the base station, the second information indicating a timing for transmitting the HARQ-ACK information, the HARQ-ACK information of the PDSCH in a Physical Uplink Control Channel (PUCCH) transmission at the timing indicated by the second information; and 
 transmit, to the base station, the HARQ-ACK information multiplexed in the PUCCH transmission based on the second information.